Low Dose Dexmedetomidine Versus Normal Saline in Multiple Fracture Ribs

Inclusion Criteria: * Adults (age 18-65 years) of American Society of Anaesthesiologists (ASA) physical status I-II * Traumatic multiple fracture ribs 3 ribs or more, who will be subjected to thorough assessments including chest 3D-CT * Undergoing conservative treatment (chest strappings) * Intractable pain with visual analogue scale (VAS) over 6 after traditional therapies * Glasgow Coma Scale (GCS) ≥ 13. Exclusion Criteria: * Multiple traumas to body parts other than chest with an abbreviated injury scale over 3 * Serious head trauma with a Glasgow coma scale lower than 13 * Mechanically ventilated patients * Massive hemothorax * Injury to the trachea or bronchus with requirement for immediate surgery * Dementia * Use of corticosteroids during ICU stay * Sepsis * Continued use of neuromuscular blocking agents and aminoglycosides antibiotic use as they are known risk factors for ICU-acquired weakness and any known hypersensitivity * Contraindication to the study drugs.